Trolley alarm and indicator.



No. 739.179. PATBNTED'SEBT. 15, 1903.

w; IL, HILLYER.

TROLLEYY. ALARM AND INDICATOR Arruoumm nun JULY 1a, 1902.

H0 IYOI'JEL. F I G I II' I' Owl- 5 W I P "I a I l W iunigllhll lll, J2; l| Al H ii FUSE Witnesses m: Nmims PETERS ammovoumq. WASHINGTON o awe anus Patented September 15, 1903.

*PATENT I OFFICE.

WILLIAM HURD HILLYER, OF ATLANTA, GEORGIA.

TROLLEY ALARM AND INDICATOR.

SPECIFICATION forming part of Letters Patent No. 739,179, dated September 15, 1903. Application filed July 19, 1902. Serial No. 116,286. (No model) To all whom it may concern:

Be it known that 1, WILLIAM HURD HILL- YER, a citizen of the United States, residing at Atlanta, in the county of Fulton and State of Georgia, have invented certain new and useful Improvements in Trolley Alarms and Indicators, of which the following is a speci fication.

This invention relates to trolley alarms and indicators for notifying a motorman or conductor the instant that a trolley slips from the feed-wire and the objects of the same are p to save time when the trolley slips off or becomes disengaged from a feed-wire by overcoming the necessity of the conductor being obliged to ring down a motorman, protection of cross-supporting wires by reason of notification to the motorman as soon as the trolley slips off, and stoppage of the car instead of allowing the loose pole to strike against said supporting-wires throughout an indefinite distance, as at present, and immaterial cost in View of preservation of parts of the line and simple and effective construction of parts having a positive action.

With these and other objects and advantages in view the invention consists in the construction and arrangement of the several parts, as will be more fully hereinafter described and claimed.

In the accompanying drawings, Figure l is a perspective view of a trolley alarm and in- I dicator embodying the features of the invention and showing it mainly inclosed by a casing. Fig. 2 is a top plan view of the improved device, showing a portion of the easing removed. Fig. 3 is a diagrammatic view showing the connections in wiring.

Similar letters of reference are employedto indicate corresponding parts in the, several the form of an armJ, provided with aterminal knob K, adapted to be thrown into engagement with and ring'a gong G. Cooperating with the opposite end of the magnet or core 0 is an armature L, pivoted, as at N, and normally withdrawn by a spring Q, adjustable through the medium of a screw T and adapted to be drawn to and remain in contact with the magnet C as long as sufficient current is turned through the coil A. The armature L is continued in the form of an arm R, provided with a terminal card or analogous device V, preferably red in color, and on which indicating words are printed, such as Trolley olf or any other suitable terms. The card and the indicating matter thereon is adapted to be exposed through an opening W in a box or casing W, fitted over the magnetic coil A, the armature R, and a part of the armature B, together with the springs H and Q and the adjustingscrews therefor, as clearly shown by Fig. 1.

By reference to Fig. 3 it will be observed that an alarm or indicator embodying the features of the invention is disposed at each end of a car, so that the signal may be audibleto both the motorman and conductor, and also in such position as to have the openings W in full view. In this diagrammatic View X designates the feeder or overhead wire; T the trolley-pole and trolley; M O, the main circuit; S SSS, the shunt; R C, resistancecoil; A A alarms and indicators; G W, ground-wire, and MM motors. The alarms and indicators A A as shown in Fig. 3, have their binding-posts P P connected to the shunt and resistance coil, and as long as the trolley remains on the feed-wire X the current flows through the shunt and resistance coil into the magnetic coils A of the indicators and alarms, thus magnetizing the cores 0 and holding the armatures B and L in contact with the ends of the same. When the trolley slips from the wire, the current is broken and the armatures B and L are released, their respective springs H and Q drawing them away from the magnets, and the knobs K of the armatures B then strike the gongs G, giving the alarm at each end of the car. The knobs do not rest against the gongs after striking the same, as the springs H are so adjusted by means of the screws T as to immediately retract the armatures B and hold them, together with their exten sions J, in the position shown by Fig. 2, and in such position the said armatures B and their extensions touch neither the gongs nor the magnets. At the same time the armatures L, mounted on the pivots N, upon being released are drawn back by the springs Q, and cause their extensions R,together with the cards V, to assume the position shown by Fig. 2, and thereby bring the cards under the openings WV in the box or casing W. In this manner whenever the trolley slips off the feed-wire the alarm is given to the motorman and conductor and the cards confirm the signal and remain in sight until the trolley is replaced, when said cards are automatically withdrawn.

WVhile it is preferred to have the improved device located at each end of a car and included in the shunt S S S S", it will be understood that one of the same may be used alone, if desired, within audible and visual distance of either a motorman or conductor.

Having thus fully described the invention, what is claimed as new is- 1. Thecombinationwithatrolleycircuitincludinga motor, a feeder and a trolley, of

an electric magnet connected to said circuit and having the opposite extremities or poles of the core thereof exposed, and audible and visual signal devices having supporting means located adjacent to the exposed poles of the core of the magnet and simultaneously controllable by the latter to indicate when the trolley becomes disengaged or slips from the feeder.

2. The combination withatrolley-circuitineluding a motor, a feeder and a trolley removably engaging the latter, of a magnet having connections with the circuit and normally energized by the latter, armatures disposed in operative relation adjacent to opposite ends of the magnet and respectively carrying a striking device and an indicator, and a gong for actuation by said striking device, whereby both an audible and visual signal will be simultaneouslygiven when the magnet is deenergized by a broken circuit due to the trolley slipping from the feeder.

In testimony whereof I aflix my signature in presence of two witnesses.

WILLIAM HURD I-IILLYER.

Witnesses:

CHAS. O. TI-IORN, J AS. GILLEsPIE. 

